Granted Patent
Utility
US 6,535,979 · App. 09/238,313
Method of ciphering data transmission, and cellular radio system
Inventors:
Jukka Vialen, Juhana Britschgi
Patented Case
View Patent ↗
Granted: Mar 18, 2003
Filed: Jan 28, 1999
Inventors
Jukka Vialen
Juhana Britschgi
Assignee (at issue)
Nokia Mobile Phones Ltd.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.